PPSSPP on Ubuntu

[LemonTree]

Please help! (My first post here)

My problem is that after building PPSSPPQt on Ubuntu (linux x64, Qt Creator 2.5.2
Based on Qt 4.8.2 (64 bit)), everything seems to work, except I have no keyboard control related to the analog input.

To be more explicit:
1) If I download a prebuilt PPSSPPSDL version for Linux x64, everything works and I can use the keys IJKL (as far as I remember) to control the analog input.
2) When I build the Qt version (PPSSPPQt) myself and I start the emulator, the analog input keeps going right and any pressure to ANY key can't stop it (it seems like the analog input is both "locked" and furthermore not mapped to any key: the reconfiguration screen can map all the keys except the analog input...).

Please help... I need the Qt version because it's much better for a desktop environment and has more options (zoom 1x-4x, fullscreen support, and so on).